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<html xmlns="http://www.w3.org/1999/xhtml">

<head>
  <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
  <title>break</title>
  <script type="text/JavaScript">
    var mynum =new Array(70,80,66,90,50,100,89);//定义数组mynum并赋值
var i=0;
while(i<mynum.length)
{
  if(mynum[i]<60)
   {
    document.write("成绩"+mynum[i]+"不及格，不用循环了"+"<br>");
    break;
   }
  document.write("成绩:"+mynum[i]+"及格，继续循环"+"<br>");
  i=i+1;
  
}
</script>
</head>

<body>
</body>

</html>